Emails reportedly revealed that Pruitt's team played a large part in what topics would be discussed on the show and what would be asked. They also showed that Pruitt was given pre-interview questions.

Fox News said in late November that it was planning to discipline employees who engaged in the conversations with Pruitt's team. The network did not provide details on who was being disciplined.

Democracy Forward and Restore Public Trust said in statement Thursday that they are demanding an "immediate investigation" into whether the EPA “violated federal laws that prohibit government funds from being expended to engage in covert propaganda."

"The public has a right to know whether the Trump Administration’s special relationship with the Fox News Channel has crossed the line from unsavory to unlawful," Democracy Forward Executive Director Anne Harkavy said. “Federal law bans secret propaganda for good reason: Americans need to know when government officials are pulling the strings of ostensibly private news broadcasts."